/******************************************************************************
* FILE: hello.c
* DESCRIPTION: A "hello world" Pthreads program.
*              Demonstrates thread creation and termination.
* AUTHOR: Blaise Barney
*         Rudy Lo
* LAST REVISED: 2021-06-13
******************************************************************************/

#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#define NUM_THREADS 5

void *sayHello(void *threadid)
{
    long tid;
    tid = (long)threadid;
    printf("Hello World! It's me, thread #%ld!\n", tid);
    pthread_exit(NULL);
}

int main(int argc, char *argv[])
{
    pthread_t threads[NUM_THREADS];
    int rc;
    long t;
    for (t = 0; t < NUM_THREADS; t++)
    {
        printf("In main: creating thread %ld\n", t);
        rc = pthread_create(&threads[t], NULL, sayHello, (void *)t);
        if (rc) {
            printf("ERROR; return code from pthread_create() is %d\n", rc);
            exit(-1);
        }
    }
    /* Last thing that main() should do */
    pthread_exit(NULL);
}
